1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84f068e0888ccf36330c10e1da96561aeea57e18c253d97da54c6556c4de6df. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1a3a781-256d-49d9-93e7-a61f0bac78e4.json and https://artists.proofprofile.net/proofs/artist/f1a3a781-256d-49d9-93e7-a61f0bac78e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bbc9f1d47f739c3b61bb68f61e6aeba56ecb67e8619c769a9e1e228e8dc597. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:22:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72388504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabee438f81cb63c96d80df871e39bd8fda51e9ea87c4ac59f601ab8637a3ee58. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES92309497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c0d0b9a63cffee4fc9839293bd17a40b3454bcfd88e2d55b2adb4a305b3aad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2436427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585070f16bd9a66ed983090e4bc213f5445eee76168b92c77db764707b86e193. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b459e22fd5876a61e26a55191791ae7c9fae1f1f76fbe5e413d773913e238d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73a8bfe6f6e75a69f138553c02bd5d40835e8b765ff2b582568f2b7489ffad4. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:02:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74ae5b71a5fe1f2a84b4adb8994396af70aaa971ba8de5dad3b4f2b960e6ee7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8f14d5511defd88541ebc5ff5843db8b350572ca55daf93af3f58ba5f97525. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0254eca1bd3f0045748e378cd97c53ca7b431c004229081fca2e913440ae4c92. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aa4b250d4c9ebc91bec7efbc853f2007ffd2700f8486f247c35de1be841c7a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e8713c385b8c4eadf141243472b3d81ca29285b6b45f735f795efced6dfb2e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9173acf8160b31f0ca37cec7c3b5872e4addfd452d4e39c64fb68352993aa0cc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWW2562797.